Outside of his business career, William Mackey enjoys a widely varied assortment of activities and pursuits. He is active in a number of civic organizations, including the Harvard Business School Club of Connecticut, Harvard Club of Northern Connecticut, President's College at the University of Hartford, World Affairs Council, and MIT Enterprise Forum.

As a volunteer member of WWUH Radio 91.3 FM, a public alternative radio station operated as a community service by the University of Hartford, William Mackey serves as a classical music announcer. He was the producer and host of "What You Will" — the Friday edition of "Evening Classics" — from May 2003 until May 2007. His program was focused on twentieth-century and contemporary chamber music, as well as music for solo instrument and voice. During the course of these more than 200 broadcasts, virtually all of the major string quartet cycles composed in the twentieth-century were played on WWUH Radio. There is probably no other music program on radio that can make a similar claim in the exploration of this engaging and sometimes challenging music.

Among William Mackey's primary interests is the evolving impact of Web 2.0 — the emerging trends in which the Web is being used as a platform for communication, collaboration, and sharing information — more particularly in seeking ways to capitalize on such features in developing and transacting business internationally.

Economics, History, Politics, Religion, Travel, America, Scotland, Switzerland, China, Environment, Nature, Space Exploration, Fine Arts, Music, Classical Music, Chamber Music, Books, Biographies, Novels, Shakespeare, Writing, Photography, Cinema, Movies, Foreign Movies, Film Noir, Dance, Ballroom Dancing, Vintage Dance, Theater, Musicals, Operetta, Opera, Radio, Internet Radio, Public Radio, Broadcasting, Public Speaking, Aviation, Flying, Gliding, Cars, Motorcycles, Formula One, Business, Networking, Marketing, Finance, Venture Capital, Internet, Web 2.0, Cloud Computing, SEO, Computers, Software, Database Management Systems, Search Engines, Adhesives, Aerospace, Management Consulting, Engineering, Science, Technology, Renewable Energy, Nanotechnology, 5S, Kaizen.

John Adams, Milton Babbitt, Elliott Carter, John Harbison, Steve Reich, Ned Rorem, Joan Tower, Julia Wolfe, Charles Wuorinen, Frank Zappa, John Zorn, Osvaldo Golijov, Ástor Piazzolla, Heitor Villa-Lobos, Gabriel Fauré, Claude Debussy, Charles Koechlin, Olivier Messiaen, Darius Milhaud, Maurice Ravel, Pierre Boulez, Edgard Varèse, Igor Stravinsky, Dmitri Shostakovich, Sergei Prokofiev, Alfred Schnittke, Arvo Pärt, Pēteris Vasks, Béla Bartók, Zoltán Kodály, Ernst von Dohnányi, Leoš Janáček, Bohuslav Martinu, Henryk Górecki, Karol Szymanowski, Arnold Schoenberg, Alban Berg, Anton Webern, Alexander Zemlinsky, Erich Wolfgang Korngold, Richard Strauss, Paul Hindemith, Karlheinz Stockhausen, Ernest Bloch, Frederick Delius, Frank Bridge, Benjamin Britten, John Rutter, John Tavener, Ralph Vaughn Williams, Gilbert & Sullivan, Stephen Sondheim, Adam Guettel.

Audra McDonald, Renée Fleming, Dawn Upshaw, Deborah Voigt, Susan Graham, Natalie Dessay, Angela Gheorghiu, Magdalena Kožená, Anna Netrebko, Plácido Domingo, Juan Diego Flórez, Ian Bostridge, Thomas Hampson, Bryn Terfel, Dmitri Hvorostovsky, Arditti Quartet, Emerson String Quartet, Kronos Quartet, Schoenberg Quartet, Ethel, eighth blackbird, Ensemble interContemporain, Los Angeles Guitar Quartet.

Van Morrison, Elvis Costello, Bruce Springsteen, Bob Dylan, Aretha Franklin, Carole King, Tori Amos, Kate Bush, Alicia Keys, Christina Aguilera, Björk, Suzanne Vega, Linda Ronstadt, Emmylou Harris, Dusty Springfield, Loretta Lynn, Kathy Mattea, Patsy Cline.

Pink Floyd, Led Zeppelin, The Beatles, The Eagles, The Doors, Genesis, The Beach Boys, Jefferson Airplane, The Rolling Stones, Crosby Stills Nash and Young, Fleetwood Mac, ZZ Top, Cream, The Grateful Dead, Frank Zappa, Creedence Clearwater Revival, Stevie Ray Vaughn, The Carpenters, The Manhattan Transfer, The Pretenders, Blondie, Traffic, Janis Joplin, The Kinks, The Police, U2, Radiohead, Coldplay, BeauSoleil, Gloria Estefan, Clannad.

Slumdog Millionaire, Harvard Beats Yale 29-29, Defiance, Frost/Nixon, Vicky Cristina Barcelona, Il y a longtemps que je t'aime, La fille coupée en deux, Quantum of Solace, The Dark Knight, Tropic Thunder, WALL·E, The Magnificent Seven, Ne le dis à personne, Wanted, Kiss Me Stupid, El Violin, Le Mépris, Kung Fu Panda, Roman de Gare, Touch of Evil, Iron Man, 4 Months 3 Weeks and 2 Days, Paris je t'aime, A Fistful of Dollars, Sweeney Todd, Seven Samurai, Michael Clayton, Blade Runner, Big Night, Lucie Aubrac, There Will be Blood, An Inconvenient Truth, Redacted, Atonement, Honeydripper, How to Cook for Your Life, No Country for Old Men, City Lights, Les Brodeuses, Lust Caution, Le Doulos, 3:10 to Yuma, The Earrings of Madame de..., Lady Chatterley, Brand Upon the Brain!, Ratatouille, After the Wedding, Triad Election, La Vie en Rose, The Valet, The Lives of Others, Mafioso, Casino Royale, Notes on a Scandal, The Queen, Andrei Rublev, Blades of Glory, Shortbus, The Illusionist, Prairie Home Companion with Garrison Keillor: The Last Show, The Devil Wears Prada, Baraka, Inside Man, Happy Feet, Tristram Shandy: A Cock and Bull Story, Gilda, Wallace & Gromit in The Curse of the Were-Rabbit, Les Triplettes de Belleville, 2046, In the Mood for Love, Rififi, Amélie.

Great Performances, Masterpiece Theater, NOVA, Live from Lincoln Center, Mystery!, America's Ballroom Challenge, Dancing with the Stars.

Freemasonry: a history by Angel Millar, For Your Eyes Only by Ian Fleming, Hornet Flight by Ken Follett, The Fashionable Dancer's Casket, An Instance of the Fingerpost by Iain Pears, SS-GB by Len Deighton, The LinkedIn Personal Trainer by Steven Tylock, Social Networks Around the World by An De Jonghe, The Afghan by Frederick Forsyth, I'm on LinkedIn -- Now What??? by Jason Alba, Topaz by Leon Uris, Jesus and Yahweh the Names Divine by Harold Bloom, Glenn Gould : A Life in Pictures, Will in the World by Stephen Greenblatt, A Year in the Life of William Shakespeare by James Shapiro, A Moveable Feast by Ernest Hemingway, Absolute Friends by John le Carré, City of Gold by Len Deighton, Triple by Ken Follett, Icon by Frederick Forsyth, December 6 by Martin Cruz Smith, Templars: The Dramatic History by Piers Paul Read, Crusades Through Arab Eyes by Amin Maalouf, Baudolino by Umberto Eco, The Alchemist by Paulo Coelho, To Boulez and Beyond by Joan Peyser, Send: The Essential Guide to Email for Office and Home by David Shipley.

"For myself I am an optimist: it does not seem to be much use being anything else."
~ Sir Winston Churchill, speech made at the Lord Mayor's banquet, London, November 9, 1954